1EZ170D5/TR8

Overview

The Microsemi Corporation 1EZ170D5/TR8 is a single Zener diode designed for through-hole mounting in the DO-204AL (DO-41) axial package. It features a nominal Zener voltage of 170 V with a tolerance of ±5% and a maximum power dissipation of 1 W. The device operates within a temperature range of -65°C to +150°C. Key electrical characteristics include a reverse leakage current of 500 nA at 137 V and a forward voltage of 1.2 V at 1 A. The component is currently classified as obsolete.

Feature Summary

• Provides stable voltage regulation via a 170 V Zener breakdown characteristic
• Engineered for high-temperature operation up to 150°C junction temperature
• Utilizes a robust axial leaded package suitable for standard through-hole assembly

Applications

• Voltage reference circuits requiring precise 170 V levels
• Overvoltage protection stages in industrial equipment
• Clamping applications in high-voltage analog signal paths

Procurement Notes

Verify component authenticity due to obsolete status. Confirm package integrity and lead condition upon receipt. Cross-reference datasheet revisions to ensure compatibility with existing design specifications. Validate thermal management requirements align with the 1 W power rating under actual operating conditions.

Selection Notes

Select this component when a 170 V Zener voltage is specifically required in a through-hole configuration. Ensure the circuit design accommodates the ±5% tolerance and the 1 W power dissipation limit. Consider the operating temperature range of -65°C to +150°C for environmental suitability. Evaluate alternative packages if surface-mount solutions are preferred.

Part Context

This part belongs to the Microsemi Zener diode family, characterized by silicon junction technology and axial packaging. It serves as a discrete semiconductor solution for voltage regulation and protection tasks. The product line emphasizes reliability in demanding electronic environments, though specific availability may be limited due to lifecycle status.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer obsolescence notices or authorized distributors for potential cross-references.